100% authentic Gucci; they come with a (Gucci) hard-shell case, cleaning cloth, and certificate of authenticity. But for me, the length is fine. I would not recommend this cord. I only wish they were truly white. The fact that the USB C port isnt fixed (can move up at an angle) feels like it helps with preventing damage on the port of the phone too, and the placement of the USB C charge port prevents the cable getting in the way of using it, so over all I highly recommend this :) But I still wear them and are warm which is perfect for me because my ankles hurt when my feet are cold and these cover my feet and ankles ???? Super good quality for the amount of colors you get! Size wise, I got a 39 as I am a 5. The cushion in these shoes makes walking on tile bearable. I found this one.